(8steps total) PrintForm Definitions DiscreteMath Sections DiscrMathExt Doc
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At: inv funs iff inv funs 2 1 2

1. A,B:Type, f:(AB), g:(BA). g o f = Id  (x:Ag(f(x)) = x)
  A,B:Type, f:(AB), g:(BA).
  g o f = Id & f o g = Id  (x:Ag(f(x)) = x) & (y:Bf(g(y)) = y)


By: Auto THEN BackThru: Hyp:1


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About:
applyfunctionuniverseequalandall
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(8steps total) PrintForm Definitions DiscreteMath Sections DiscrMathExt Doc